Variable-speed gear.



Patented Dec. 30, I902.

J. M. OUGH & M. WADIJELL.

VARIABLE SPEED GEAR.

(Application filed Sept. 27. 1900.)

(No lludel.)

7713567 66015 ea: jovenio rs I uazww, m% 7 1 W llnirrnn terns PATENTOFFICE.

JOSEPH M. OUGH, OF SAN FRANCISCO, CALIFORNIA, AND MONTGOMERY WVADDELL,OF NEW YORK, N. Y.

VARIABLE-SPEED GEAR.

SPECIFICATION forming part of Letters Patent N 0. 716,928, datedDecember 1902- I Application filed September 27, 1900. $erial No.31,330. (No model.)

To (all whom it may concern: Be it known that we, JOSEPH M. OUGH, acitizen of the United States, residing in the city of San Francisco, inthe county of San Francisco and State of California, and MONT- GOMERYWVADDELL, a subject of the Queen of Great Britain,residingin-thecity,county, and State of New Yorlghave jointly invented acertain new and useful Improvement in Variable- Speed Gear, of which thefollowing is a specification.

Our present invention relates particularly to, improvements in planetarygears adapted to propulsion of vehicles wherein a plurality of speeds isdesirable for moving forward and one speed for reverse movement.

The principal object of our invention is the provisionof means whereby aslow backward movement may be produced in combination with means forsuitably-graduated forward movements. 7

Our invention is illustrated in the accompanying drawings, wherein---Figure 1 is a longitudinal vertical section of our device. Fig. 2 is anend view thereof; and Fig. 3 is a transverse section, one half upon theline 3 3 of Fig. 1 and the other half on the line 4 4..

The driving axle or shaft 1 is supplied with two fast driving-pinions 2and 3, between which a two-part transmitting-sleeve 4 turns loosely uponsaid shaft. The sprocket 5 or other driven part is fixed to said sleeve.Upon one side the two-part slceve4 is expanded into a bearing-disk 6,while the opposite extremity of said sleeve is expanded into a drum 7,

provided with an internal gear. An auxiliary bearing-disk 8 turnsloosely upon the shaft 1, and an axis 9 has its two extremitiesjournaled in the respective disks 6 and 8.

Fast to the axis 9 are two orbital pinions 10 and 11, the smaller ofwhich engages with the pinion 2 and the larger of which overlaps saidpinion between it and the auxiliary disk 8.

Of course these two may be considered as one pinion having two sectionsof different diameters. Engaging with the pinions 10 and 11 are twointernal gears within drums 12 13, as shown. Either of these drums maybe held fixed by means of the strap-brakes 14 15.

The drum 13 is considerably Wider than the pinion 1.1, and within theportion of said drum which is outside of the disk 8 we employ anexpansioirgrip composed of an elastic band 16, to one end of which ispivoted the lever 17, whose short end by pressing upon the opposite endof the band 16 acts to expand it and grip the drum 13, thus looking itto the shaft 1. The outer end of the lever 17 bears upon the slidablesleeve 18, which is beveled at its inner end, so that when said sleeveis pushed inward and the lever rides upon the cylindrical portion ofsaid sleeve the lever acts to expand the gripping-band 16, and when thesleeve 18 is pulled out the gripping pressure is released by movement ofthe end of the lever toward the shaft 1.

The second driving-pinion 3 lies within the drum 7, whose internal gearengages with a pinion 19, itself engaging with pinion 3 and turning uponor with the shaft 20, carried in a bearing on the reversing-drum 21.This drum may be held fixed by means of the strap-brake or itsequivalent for reversing the movement of the sprocket 5.

To start our gear at the low speed, the brake 14 is first applied. Thepinion 2 then forces the orbital pinion 10 to roll around within theinternal gear in the drum 12, and the transmitting-sleeve and sprocket 45 are thus forced to turn in the same direction as the shaft 1, but muchmore slowly. Upon releasing the brake 14 and applying the brake 15 thesame reaction takes place between pinion 11 and the gear within the drum13; but on account of the greater size of the pinion in relation to itssurrounding drum the forward movement now produced in thetransmitting-sleeve 4 and sprocket 5 is increased, being still less thanthat of the shaft 1.

Full speed is produced by locking together the shaft 1 and the drum 13,whereby the pinions 10 11 are prevented from turning and the sleeve 4moves with the same speedas the shaft 1.

Upon releasing all other brakes, but applying the brake 22, the pinion19 is held in a fixed position, and through it the drivingpinion 3 actsto turn the drum 7, which carries with it the transmitting-sleeve.

the shaft 1 and much slower.

This

by one of said transmitting parts on one side over one driving-pinionand an internal gear carried by the other transmitting part on theopposite side over the other driving-pinion; in combination with adriven element keyed to both parts of said sleeve and means whereby eachpart of said sleeve may be independently brought into operative relationwith its corresponding driving-pinion.

JOSEPH M. OUGH. MONTGOMERY WADDELL.

Witnesses:

CHAS. F. HALSTED, HAROLD S. MACKAYE.

